Find all School-related info fast with the new School-Specific MBA Forum

It is currently 28 Aug 2015, 07:57
GMAT Club Tests

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

A milkman adds 5 liters of water to a certain quantity of

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Intern
Intern
avatar
Joined: 25 Feb 2008
Posts: 16
Followers: 0

Kudos [?]: 1 [0], given: 0

A milkman adds 5 liters of water to a certain quantity of [#permalink] New post 13 Mar 2008, 11:14
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

A milkman adds 5 liters of water to a certain quantity of pure milk costing $3/liter. He sells the mixture at the same price as before and makes a profit of 20%. What is the percentage of milk in the mixture?

a) 83.33
b) 93.33
c) 73.33
d) 55
e) 68

First of all, how awful is the milkman that would do such a thing?! more seriously, I am having trouble with this problem. I get 80% as the answer, so I would guess 83.33% since they are close. Can someone walk me through this?

Thanks in advance!

>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
OA is A
1 KUDOS received
Senior Manager
Senior Manager
avatar
Joined: 15 Aug 2007
Posts: 252
Schools: Chicago Booth
Followers: 1

Kudos [?]: 58 [1] , given: 0

Re: Milkman Mixture [#permalink] New post 13 Mar 2008, 11:31
1
This post received
KUDOS
It's 83.33%

Assuming x is the volume of milk...

x liters cost 3x
After adding water, x+5 liters were sold for 3(x+5)

So percentage profit = [3(x+5) - 3x]*100 / 3x which is equal to 20
Solving for x gives x=25

Percentage of x = 25*100/30 = 83.33%
Intern
Intern
avatar
Joined: 25 Feb 2008
Posts: 16
Followers: 0

Kudos [?]: 1 [0], given: 0

Re: Milkman Mixture [#permalink] New post 13 Mar 2008, 11:37
I think I am still missing something. Sometimes these problems get you so hung up you cannot see them clearly.
Is the 30 the 25M+5W? Just double checking
Intern
Intern
avatar
Joined: 25 Feb 2008
Posts: 16
Followers: 0

Kudos [?]: 1 [0], given: 0

Re: Milkman Mixture [#permalink] New post 13 Mar 2008, 11:50
forget it, i answered my own silly question.

Thanks for your help sreehari!
Re: Milkman Mixture   [#permalink] 13 Mar 2008, 11:50
Display posts from previous: Sort by

A milkman adds 5 liters of water to a certain quantity of

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.